Abstract
InAlAs/InGaAs heterostructures are studied as multiplier elements for submillimeter‐wave monolithic integrated circuits. The designs considered for this purpose are based on the principle of conventional HEMT, HEMT with n+bottom layer and a new proposed scheme of quantum‐confined modulated charge (QCMC). The QCMC diode is analyzed theoretically and experimentally showing its potential operation capability at 1.5 THz.

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